Cerro Tololo Inter-American Observatory
E12020
Cerro Tololo Inter-American Observatory is a major astronomical observatory complex in northern Chile that hosts multiple world-class telescopes used for cutting-edge research on the universe.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Cerro Tololo Inter-American Observatory canonical | 34 |
| Cerro Tololo | 10 |
| Cerro Tololo Inter-American Observatory facility | 1 |
| Cerro Tololo means Tololo Hill in Spanish | 1 |
| Cerro Tololo telescope suite | 1 |
| Cerro Tololo, Chile | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10087 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Cerro Tololo Inter-American Observatory Context triple: [Coquimbo Region, hasObservatory, Cerro Tololo Inter-American Observatory]
-
A.
La Silla Observatory
La Silla Observatory is a major European Southern Observatory (ESO) facility in Chile known for its high-altitude optical telescopes that have contributed significantly to exoplanet and stellar research.
-
B.
du Pont Telescope
The du Pont Telescope is a 2.5-meter optical telescope at Chile’s Las Campanas Observatory used for a wide range of astronomical imaging and spectroscopic research.
-
C.
Las Campanas Observatory
Las Campanas Observatory is a major astronomical observatory in Chile renowned for its high-quality observing conditions and its role in cutting-edge optical and infrared astronomy.
-
D.
Swope Telescope
The Swope Telescope is a 1-meter-class optical telescope at Chile’s Las Campanas Observatory, known for its role in supernova and transient object discoveries.
-
E.
Giant Magellan Telescope
The Giant Magellan Telescope is a next-generation, extremely large ground-based optical and infrared telescope designed to achieve unprecedented resolution for astronomical observations.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Cerro Tololo Inter-American Observatory Target entity description: Cerro Tololo Inter-American Observatory is a major astronomical observatory complex in northern Chile that hosts multiple world-class telescopes used for cutting-edge research on the universe.
-
A.
La Silla Observatory
La Silla Observatory is a major European Southern Observatory (ESO) facility in Chile known for its high-altitude optical telescopes that have contributed significantly to exoplanet and stellar research.
-
B.
du Pont Telescope
The du Pont Telescope is a 2.5-meter optical telescope at Chile’s Las Campanas Observatory used for a wide range of astronomical imaging and spectroscopic research.
-
C.
Las Campanas Observatory
Las Campanas Observatory is a major astronomical observatory in Chile renowned for its high-quality observing conditions and its role in cutting-edge optical and infrared astronomy.
-
D.
Swope Telescope
The Swope Telescope is a 1-meter-class optical telescope at Chile’s Las Campanas Observatory, known for its role in supernova and transient object discoveries.
-
E.
Giant Magellan Telescope
The Giant Magellan Telescope is a next-generation, extremely large ground-based optical and infrared telescope designed to achieve unprecedented resolution for astronomical observations.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical observatory
ⓘ
observatory complex ⓘ |
| altitude |
approximately 2200 meters
ⓘ
approximately 7200 feet ⓘ |
| climate | arid ⓘ |
| constructionBegan | 1960s ⓘ |
| country | Chile ⓘ |
| geographicFeature | Andes foothills ⓘ |
| governedByAgreementWith | Government of Chile ⓘ |
| hasAcronym | CTIO ⓘ |
| hasFacility |
infrared telescopes
ⓘ
instrument laboratories ⓘ multiple optical telescopes ⓘ residential facilities ⓘ support buildings ⓘ |
| hasMirrorDiameter | 4 meters for Víctor M. Blanco Telescope ⓘ |
| hemisphere | Southern Hemisphere ⓘ |
| hostsInstrumentOn |
Dark Energy Camera
ⓘ
surface form:
Dark Energy Camera on Víctor M. Blanco 4-meter Telescope
|
| hostsSurvey |
Dark Energy Survey
ⓘ
Southern Astrophysical Research-related programs ⓘ |
| hostsTelescope |
Dark Energy Camera
ⓘ
SMARTS 0.6-meter Telescope ⓘ SMARTS 0.9-meter Telescope ⓘ SMARTS 1.3-meter Telescope ⓘ SMARTS 1.5-meter Telescope ⓘ Víctor M. Blanco 4-meter Telescope ⓘ |
| knownFor |
cosmology research
ⓘ
extragalactic astronomy ⓘ galactic structure studies ⓘ supernova studies ⓘ variable star research ⓘ wide-field imaging ⓘ |
| languageOfName | Spanish ⓘ |
| locatedIn |
Coquimbo Region
ⓘ
northern Chile ⓘ |
| locatedNear | La Serena ⓘ |
| locatedOn |
Cerro Tololo Inter-American Observatory
self-linksurface differs
ⓘ
surface form:
Cerro Tololo
|
| nameMeaning |
Cerro Tololo Inter-American Observatory
self-linksurface differs
ⓘ
surface form:
Cerro Tololo means Tololo Hill in Spanish
|
| opened | 1960s ⓘ |
| operatedBy | Association of Universities for Research in Astronomy ⓘ |
| operatedFor | National Science Foundation ⓘ |
| partOf | NOIRLab ⓘ |
| primaryUse |
astronomical research
ⓘ
infrared astronomy ⓘ optical astronomy ⓘ |
| skyQuality | dark skies ⓘ |
| supportsProgram | U.S. and Chilean institutional collaborations ⓘ |
| usedBy | international astronomy community ⓘ |
| usedFor | cutting-edge research on the universe ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Cerro Tololo Inter-American Observatory Description of subject: Cerro Tololo Inter-American Observatory is a major astronomical observatory complex in northern Chile that hosts multiple world-class telescopes used for cutting-edge research on the universe.
Referenced by (48)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Northern Chile
Cerro Tololo Inter-American Observatory
→
locatedOn
→
Cerro Tololo Inter-American Observatory
self-linksurface differs
ⓘ
this entity surface form:
Cerro Tololo
Cerro Tololo Inter-American Observatory
→
nameMeaning
→
Cerro Tololo Inter-American Observatory
self-linksurface differs
ⓘ
this entity surface form:
Cerro Tololo means Tololo Hill in Spanish
this entity surface form:
Cerro Tololo
this entity surface form:
Cerro Tololo
this entity surface form:
Cerro Tololo
this entity surface form:
Cerro Tololo
this entity surface form:
Cerro Tololo Inter-American Observatory facility
this entity surface form:
Cerro Tololo
this entity surface form:
Cerro Tololo, Chile
this entity surface form:
Cerro Tololo
subject surface form:
Coquimbo Region
this entity surface form:
Cerro Tololo
this entity surface form:
Cerro Tololo
this entity surface form:
Cerro Tololo telescope suite